(Nearly all of the patches which are listed below have been modified, fixed or extended in some way, and so are not the same as the originals which are linked).
* Add company settings to enable competitors to buy/renew vehicles in this company's depots.
* Add setting to control whether trains can crash with trains owned by other companies.
* [Give money to company, instead of player](https://www.tt-forums.net/viewtopic.php?f=33&t=63899), broadcast money transfer notifications to all players.
* Add setting to enable non-admin multiplayer clients to rename towns.
* Add a password mechanism to change network game settings from a network client.
* Change network protocol to send server/join and rcon passwords in hashed form instead of in clear text.
* Various changes to reduce the probability of desyncs and improve desync reporting/diagnostics.
* Add support for zstd savegame compression for autosaves and network joins.
* Increase the number of settings which can be changed in multiplayer.
#### Money
* Add setting to control dates over which inflation is applied.
* Allow shift-clicking on borrow/repay money buttons to enter a quantity.
#### Cheats
* Add support for server admin use of money, magic bulldozer, tunnels and jet crashes cheats in multiplayer.
* Add setting to allow non server admins to use the money cheat in multiplayer.
* Allow clicking the money text in the cheats window to enter a quantity.
* Add cheats to set inflation income and cost factors.
* Various changes to improve handling of savegames which use features not in trunk.
* Savegames from this patchpack are not loadable in trunk.
* Savegames from trunk up to the last savegame version which has been merged into this branch (*jgrpp*) should be loadable in this patchpack.
* Savegames from other branches which use the save/load code in the *save_ext* branch (usually suffixed: *-sx*) which are also merged into this branch (*jgrpp*), or where the added feature is marked as discardable/ignorable, should be loadable in this patchpack.
* Savegames from other patched versions are not loadable in this patchpack except for savegames from:
* The *tracerestrict* branch ([routing restrictions patch](http://www.tt-forums.net/viewtopic.php?f=33&t=73397))
* The [Spring 2013 Patch Pack](http://www.tt-forums.net/viewtopic.php?f=33&t=66892) v2.0 - v2.4 (subject to caveats, see below)
* [Joker's Patch Pack](https://www.tt-forums.net/viewtopic.php?f=33&t=74365) v1.19 - v1.27 (subject to caveats, see below)
* [Chill's Patch Pack](https://www.tt-forums.net/viewtopic.php?f=33&t=47622) v8 and v14.7 (subject to caveats, see below)
#### Caveats for loading savegames from the [Spring 2013 Patch Pack](http://www.tt-forums.net/viewtopic.php?f=33&t=66892):
* This is not guaranteed to be bug free
* Savegames with huge airports are rejected
* Map sizes greater than 16k x 16k are rejected
* PAX signals/stations and traffic lights are cleared, leaving ordinary signals/stations/roads
* Rail ageing/grass on tracks, trip histories, leave order/wait for cargo, auto advertising campaigns, base cost multipliers and other features not in this patch pack are dropped/ignored.
* SpringPP v2.0.102/103 only:
* Savegames which have aircraft approaching, landing, taking off or landed at an oil rig are rejected
* The inflation cost multiplier is adjusted on load
#### Caveats for loading savegames from [Joker's Patch Pack](https://www.tt-forums.net/viewtopic.php?f=33&t=74365):
* This is not guaranteed to be bug free
* Logic signals are cleared, leaving ordinary signals
* Various vehicle separation settings and partially-automatic modes are not supported.
* Rail ageing/grass on tracks, trip histories, waiting cargo histories, station cargo punishment and other features not in this patch pack are dropped/ignored.
Many features have two branches, the *feature* branches are just the raw features, without any modified savegame code.
There are not generally savegame compatible with anything else, except for loading of trunk savegame versions at or before the point where the branch diverged from trunk.
All other load attempts may result in undefined behaviour.
The *feature-sx* branches use the savegame framework in the *save_ext* branch.
We'll keep support going on old platforms as long as someone is interested in supporting them, except where it means the project can't move forward to keep up with language and compiler features.
OpenTTD is usually straightforward to install, but for more help the wiki [includes an installation guide](https://wiki.openttd.org/en/Manual/Installation).
Add-on content can also be installed manually, but that's more complicated; the [OpenTTD wiki](https://wiki.openttd.org/) may offer help with that, or the [OpenTTD directory structure guide](./docs/directory_structure.md).
See also the wiki [guide to NewGRFs](https://wiki.openttd.org/en/Manual/NewGRF) and [the forum graphics development section](https://www.tt-forums.net/viewforum.php?f=66).
Game scripts can provide additional challenges or changes to the standard OpenTTD gameplay, for example setting transport goals, or changing town growth behaviour.
Game scripts can be added via the 'Check Online Content' button in the main menu.
See also the wiki [guide to game scripts](https://wiki.openttd.org/en/Manual/Game%20script) and [the forum graphics game script section](https://www.tt-forums.net/viewforum.php?f=65).
- [OpenTTD on Github](https://github.com/openTTD/) for code repositories and for reporting issues
- [forum.openttd.org](https://forum.openttd.org/) - the primary community forum site for discussing OpenTTD and related games
- [OpenTTD wiki](https://wiki.openttd.org/) community-maintained wiki, including topics like gameplay guide, detailed explanation of some game mechanics, how to use add-on content (mods) and much more
- the OpenTTD wiki has a [page listing OpenTTD communities](https://wiki.openttd.org/en/Community/Community) including some in languages other than English
We welcome contributors to OpenTTD. More information for contributors can be found in [CONTRIBUTING.md](./CONTRIBUTING.md)
### 2.2) Reporting bugs
Good bug reports are very helpful. We have a [guide to reporting bugs](./CONTRIBUTING.md#bug-reports) to help with this.
Desyncs in multiplayer are complex to debug and report (some software development skils are required).
Instructions can be found in [debugging and reporting desyncs](./docs/debugging_desyncs.md).
### 2.3) Translating
OpenTTD is translated into many languages. Translations are added and updated via the [online translation tool](https://translator.openttd.org).
## 3.0) Licensing
OpenTTD is licensed under the GNU General Public License version 2.0.
For the complete license text, see the file '[COPYING.md](./COPYING.md)'.
This license applies to all files in this distribution, except as noted below.
The squirrel implementation in `src/3rdparty/squirrel` is licensed under the Zlib license.
See `src/3rdparty/squirrel/COPYRIGHT` for the complete license text.
The md5 implementation in `src/3rdparty/md5` is licensed under the Zlib license.
See the comments in the source files in `src/3rdparty/md5` for the complete license text.
The implementations of Posix `getaddrinfo` and `getnameinfo` for OS/2 in `src/3rdparty/os2` are distributed partly under the GNU Lesser General Public License 2.1, and partly under the (3-clause) BSD license.
The exact licensing terms can be found in `src/3rdparty/os2/getaddrinfo.c` resp. `src/3rdparty/os2/getnameinfo.c`.
